<template>
  <form-item-wrapper
    :designer="designer"
    :field="field"
    :rules="rules"
    :design-state="designState"
    :parent-widget="parentWidget"
    :parent-list="parentList"
    :index-of-parent-list="indexOfParentList"
    :sub-form-row-index="subFormRowIndex"
    :sub-form-col-index="subFormColIndex"
    :sub-form-row-id="subFormRowId"
    >
    <!-- el-upload增加:name="field.options.name"后，会导致又拍云上传失败！故删除之！！ -->
    <el-upload
      ref="fieldEditor"
      :disabled="field.options.disabled || isReadMode || field.options.readonly"
      action="#"
      :headers="uploadHeaders"
      :data="uploadData"
      :auto-upload="false"
      :with-credentials="field.options.withCredentials"
      :multiple="field.options.multipleSelect"
      :file-list="fileList"
      :show-file-list="field.options.showFileList"
      list-type="picture-card"
      :class="{ hideUploadDiv: uploadBtnHidden || isReadMode }"
      :limit="field.options.limit"
      :on-exceed="handlePictureExceed"
      :on-preview="handlePicturePreview"
      :before-upload="beforePictureUpload"
      :on-change="handlePictureChange"
      :on-success="handlePictureUpload"
      :on-error="handleUploadError"
      :before-remove="handleBeforeRemove"
      :on-remove="handlePictureRemove"
    >
      <template #tip>
        <div class="el-upload__tip" v-if="!!field.options.uploadTip">
          {{ field.options.uploadTip }}
        </div>
      </template>
      <div class="uploader-icon"><svg-icon icon-class="el-plus" /></div>
    </el-upload>

    <div
      v-if="showPreviewDialogFlag"
      v-drag="['.drag-dialog.el-dialog', '.drag-dialog .el-dialog__header']"
    >
      <el-dialog
        title=""
        v-model="showPreviewDialogFlag"
        append-to-body
        width="60%"
        :show-close="true"
        class="drag-dialog small-padding-dialog"
        :close-on-click-modal="true"
        :close-on-press-escape="true"
        :destroy-on-close="true"
      >
        <img :src="previewUrl" style="width: 100%" alt="" />
      </el-dialog>
    </div>
  </form-item-wrapper>
</template>

<script>
import FormItemWrapper from "./form-item-wrapper";
import SvgIcon from "@/components/svg-icon";
import emitter from "@/utils/emitter";
import i18n, { translate } from "@/utils/i18n";
import { deepClone, evalFn } from "@/utils/util";
import fieldMixin from "@/components/form-designer/form-widget/field-widget/fieldMixin";
// import { json } from 'stream/consumers';

export default {
  name: "picture-upload-widget",
  componentName: "FieldWidget", //必须固定为FieldWidget，用于接收父级组件的broadcast事件
  mixins: [emitter, fieldMixin, i18n],
  props: {
    field: Object,
    parentWidget: Object,
    parentList: Array,
    indexOfParentList: Number,
    designer: Object,

    designState: {
      type: Boolean,
      default: false,
    },

    subFormRowIndex: {
      /* 子表单组件行索引，从0开始计数 */ type: Number,
      default: -1,
    },
    subFormColIndex: {
      /* 子表单组件列索引，从0开始计数 */ type: Number,
      default: -1,
    },
    subFormRowId: {
      /* 子表单组件行Id，唯一id且不可变 */ type: String,
      default: "",
    },
  },
  components: {
    FormItemWrapper,
    SvgIcon,
  },
  data() {
    return {
      oldFieldValue: null, //field组件change之前的值
      fieldModel: [],
      rules: [],

      uploadHeaders: {
        token: "Bearer " + sessionStorage.getItem("token"),
      },
      uploadData: {
        key: "", //七牛云上传文件名
        //token: '',  //七牛云上传token

        //policy: '',  //又拍云上传policy
        //authorization: '',  //又拍云上传签名
      },
      fileList: [], //上传文件列表
      fileListBeforeRemove: [], //删除前的文件列表

      previewUrl: "",
      showPreviewDialogFlag: false,
    };
  },
  computed: {
    realUploadURL() {
      return "/api/form/upload";
      let uploadURL = this.field.options.uploadURL;
      if (
        !!uploadURL &&
        (uploadURL.indexOf("DSV.") > -1 || uploadURL.indexOf("DSV[") > -1)
      ) {
        let DSV = this.getGlobalDsv();
        console.log("test DSV: ", DSV); //防止DSV被打包工具优化！！！
        return evalFn(this.field.options.uploadURL, DSV);
      }

      return this.field.options.uploadURL;
    },

    uploadBtnHidden() {
      return !this.fileList || this.fileList.length >= this.field.options.limit;
    },
  },
  beforeCreate() {
    /* 这里不能访问方法和属性！！ */
  },

  created() {
    /* 注意：子组件mounted在父组件created之后、父组件mounted之前触发，故子组件mounted需要用到的prop
         需要在父组件created中初始化！！ */
    this.registerToRefList();
    this.initFieldModel();
    this.initEventHandler();
    this.buildFieldRules();

    this.handleOnCreated();
  },

  mounted() {
    this.handleOnMounted();
  },

  beforeUnmount() {
    this.unregisterFromRefList();
  },

  methods: {
    httpRequest(data) {
      console.log(data);
      let formData = new FormData();
      formData.append("file", data.file);
      formData.append("key", data.file.name);
      window
        .$http({
          url: `/form/upload`,
          method: "post",
          headers: { "Content-Type": "multipart/form-data" },
          data: formData,
        })
        .then((res) => {
          this.fileList.push({
            name: res.data,
            url: data.file,
          });
          console.log(this.fileList);
          console.log(res);
        });
    },

    handlePictureExceed() {
      let uploadLimit = this.field.options.limit;
      this.$message.warning(
        this.i18nt("render.hint.uploadExceed").replace(
          "${uploadLimit}",
          uploadLimit
        )
      );
    },

    handlePicturePreview(file) {
      this.previewUrl = file.url;
      this.showPreviewDialogFlag = true;
    },

    beforePictureUpload(file) {
      console.log(file);
      let fileTypeCheckResult = false;
      if (!!this.field.options && !!this.field.options.fileTypes) {
        let uploadFileTypes = this.field.options.fileTypes;
        if (uploadFileTypes.length > 0) {
          fileTypeCheckResult = uploadFileTypes.some((ft) => {
            return file.type === "image/" + ft;
          });
        }
      }
      if (!fileTypeCheckResult) {
        this.$message.error(
          this.i18nt("render.hint.unsupportedFileType") + file.type
        );
        return false;
      }

      let fileSizeCheckResult = false;
      let uploadFileMaxSize = 5; //5MB
      if (!!this.field.options && !!this.field.options.fileMaxSize) {
        uploadFileMaxSize = this.field.options.fileMaxSize;
      }
      fileSizeCheckResult = file.size / 1024 / 1024 <= uploadFileMaxSize;
      if (!fileSizeCheckResult) {
        this.$message.error(
          '文件大小已超出: ' + uploadFileMaxSize + "MB"
        );
        return false;
      }

      this.uploadData.key = file.name;
      return this.handleOnBeforeUpload(file);
    },

    handleOnBeforeUpload(file) {
      if (!!this.field.options.onBeforeUpload) {
        let bfFunc = new Function("file", this.field.options.onBeforeUpload);
        let result = bfFunc.call(this, file);
        if (typeof result === "boolean") {
          return result;
        } else {
          return true;
        }
      }

      return true;
    },

    updateFieldModelAndEmitDataChangeForUpload(
      fileList,
      customResult,
      defaultResult
    ) {
      this.fieldModel = this.fieldModel || [];
      let oldValue = deepClone(this.fieldModel);
      console.log(customResult);
      console.log(defaultResult);
      if (!!customResult && !!customResult.name && !!customResult.url) {
        this.fieldModel.push({
          name: customResult.name,
          url: customResult.url,
        });
      } else if (
        !!defaultResult &&
        !!defaultResult.name &&
        !!defaultResult.url
      ) {
        this.fieldModel.push({
          name: defaultResult.name,
          url: defaultResult.url,
        });
      } else {
        this.fieldModel = deepClone(fileList);
      }
      console.log(this.fieldModel);
      this.syncUpdateFormModel(this.fieldModel);
      this.emitFieldDataChange(this.fieldModel, oldValue);
    },
    handlePictureChange(file, fileList) {
      console.log(file);
      // console.log(this.beforePictureUpload(file.raw));
      if(!this.beforePictureUpload(file.raw)){
        // 上传失败手动移除失败的文件
        this.$refs.fieldEditor.handleRemove(file)
        return false;
      }

      let fileArr = JSON.parse(JSON.stringify(fileList));
      let formData = new FormData();
      formData.append("file", file.raw);
      formData.append("key", file.name);
      const loading = this.$loading({
        lock: true,
        text: "上传中....",
        spinner: "el-icon-loading",
        background: "rgba(0, 0, 0, 0.7)",
      });
      try {
        window
        .$http({
          url: `/sys/provider/upload`,
          method: "post",
          headers: { "Content-Type": "multipart/form-data" },
          data: formData,
        })
        .then((res) => {
          // this.fileList.push({
          //   name: res.data,
          //   url: data.file,
          // });
          
          for (let index = 0; index < fileArr.length; index++) {
            let element = fileArr[index];
            if(element.uid == file.uid){
              element.onlyName = res.data;
            }
          }
          let customResult = null;
          if (!!this.field.options.onUploadSuccess) {
            let customFn = new Function(
              "result",
              "file",
              "fileList",
              this.field.options.onUploadSuccess
            );
            customResult = customFn.call(this, res, file, fileList);
          }
          this.updateFieldModelAndEmitDataChangeForUpload(
            fileArr,
            customResult,
            res
          );
          this.fileList = deepClone(fileArr);
          loading.close();
          this.$nextTick(() => {
            this.clearValidate();
          });
        }).catch(err=>{
          this.$refs.fieldEditor.handleRemove(file);
          loading.close();
        })
      } catch (error) {
        this.$message.error('上传失败');
        this.$refs.fieldEditor.handleRemove(file);
        loading.close();
      }
      
    },
    handlePictureUpload(res, file, fileList) {
      console.log("handlePictureUpload", res, file, fileList);
      // let formData =  new FormData();
      // formData.append('file', data.file);
      // formData.append('key', data.file.name);
      // window.$http({
      //   url:`/form/upload`,
      //   method :'post',
      //   headers: { 'Content-Type': 'multipart/form-data' },
      //   data:formData,
      // }).then(res=>{
      //   this.fileList.push({
      //     name:res.data,
      //     url:data.file
      //   })
      //   console.log(this.fileList);
      //   console.log(res);
      // })
      if (file.status === "success") {
        let customResult = null;
        if (!!this.field.options.onUploadSuccess) {
          let customFn = new Function(
            "result",
            "file",
            "fileList",
            this.field.options.onUploadSuccess
          );
          customResult = customFn.call(this, res, file, fileList);
        }

        this.updateFieldModelAndEmitDataChangeForUpload(
          fileList,
          customResult,
          res
        );
        this.fileList = deepClone(fileList);

        this.$nextTick(() => {
          this.clearValidate();
        });
      }
    },

    updateFieldModelAndEmitDataChangeForRemove(file, fileList) {
      let oldValue = deepClone(this.fieldModel);
      let foundFileIdx = -1;
      this.fileListBeforeRemove.map((fi, idx) => {
        /* 跟element-ui不同，element-plus删除文件时this.fileList数组对应元素已被删除！！ */
        if (
          fi.name === file.name &&
          (fi.url === file.url || (!!fi.uid && fi.uid === file.uid))
        ) {
          /* 这个判断有问题？？ */
          foundFileIdx = idx;
        }
      });
      if (foundFileIdx > -1) {
        this.fieldModel.splice(foundFileIdx, 1);
      }

      this.syncUpdateFormModel(this.fieldModel);
      this.emitFieldDataChange(this.fieldModel, oldValue);
    },

    handleBeforeRemove(file, fileList) {
      /* 保留删除之前的文件列表！！ */
      this.fileListBeforeRemove = deepClone(fileList);
    },

    handlePictureRemove(file, fileList) {
      this.updateFieldModelAndEmitDataChangeForRemove(file, fileList);
      this.fileList = deepClone(fileList);

      if (!!this.field.options.onFileRemove) {
        let customFn = new Function(
          "file",
          "fileList",
          this.field.options.onFileRemove
        );
        customFn.call(this, file, fileList);
      }
    },

    handleUploadError(err, file, fileList) {
      if (!!this.field.options.onUploadError) {
        let customFn = new Function(
          "error",
          "file",
          "fileList",
          this.field.options.onUploadError
        );
        customFn.call(this, err, file, fileList);
      } else {
        this.$message({
          message: this.i18nt("render.hint.uploadError") + err,
          duration: 3000,
          type: "error",
        });
      }
    },
  },
};
</script>

<style lang="scss" scoped>
@import "../../../../styles/global.scss"; /* form-item-wrapper已引入，还需要重复引入吗？ */

.full-width-input {
  width: 100% !important;
}

.hideUploadDiv {
  :deep(div.el-upload--picture-card) {
    /* 隐藏最后的图片上传按钮 */
    display: none;
  }

  :deep(div.el-upload--text) {
    /* 隐藏最后的文件上传按钮 */
    display: none;
  }

  :deep(div.el-upload__tip) {
    /* 隐藏最后的文件上传按钮提示 */
    display: none;
  }
}

.uploader-icon {
  height: 100%;
  display: flex;
  color: #8c939d;
  font-size: 28px;
  justify-content: center;
  align-items: center;
}
</style>
